I am very sorry to read that, the truth is that right now I am not focused on options for modest computers, and they are not planned for now, however It seems too important to me to delay it too long, I will work on it.
Although let me add that this is a game that uses physics very extensively, and requires enough power to not have serious problems in the gameplay, the physics are very fun and give a natural look to the interactions, but they are also demanding and sometimes unstable, and even if there was settings today, these settings will affect the graphics therefore the consumption of the GPU, but not the consumption of the CPU.
I'm really sorry to give you bad news.
Thanks for the feedback.